html, body {
    height: 100%;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: linear-gradient(90deg, #151d3f, #5c2f3f, #9a413d, #d95437);
    background-size: cover;
}

.register-div {
    background-color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    border-radius: 5px;
}

.register-div h1 {
    margin-bottom: 30px;
}

.register-div form {
    display: flex;
    flex-direction: column;
    align-items: center;
}


.register-div .register-form-item {
    margin-bottom: 20px;
}

.register-div .register-form-item input {
    width: 300px;
    height: 40px;
    padding-left: 10px;
    padding-right: 10px;
    border-radius: 3px;
    border: 1px solid #CCCCCC;
}

.register-div form .btn-register {
    height: 40px;
    width: 320px;
    background-color: #009688;
    border: none;
    color: white;
    border-radius: 3px;
}

#code {
    width: 220px;
    height: 40px;
    padding-left: 10px;
    padding-right: 10px;
    border-radius: 3px;
    border: 1px solid #CCCCCC;
    vertical-align: middle;
}

.register-div .register-form-item img {
    vertical-align: middle;
}